please all people read at this message

hi i'm heralcker from colombia.........i study at the corazonistas school and i need some help to invent something to my english class and i don't know what invent i need your help and abilityes
to do the best invent in the class............... the invent just only be things than y can make because i need to give the invent and a maketing of it..... please send my ideas i only have 6 days please.....

ever thank
jeralcker

please i realy need your help

http://www.scitoys.com/scitoys/scitoys/echem/echem.html

bludgeon has a good hint..

if you want to try something else..
moving things always make an impression..

a brushles electro motor
http://fly.hiwaay.net/~palmer/motor.html

electrostatic motor
http://amasci.com/emotor/emotor.html

thanks for give the ideas
bye